Update actions/checkout action to v7

Author: xdev-renovate

.github/workflows/antora-build.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install Node.js
         uses: actions/setup-node@v6

.github/workflows/check-build.yml

@@ -160,7 +160,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Node.js
         uses: actions/setup-node@v6